Rh(III)-Catalyzed One-Pot Synthesis of Benzimidazoquinazolines via C–H Amidation–Cyclization of <i>N</i>-LG-2-phenylbenzoimidazoles
作者:Linhua Xu、Tingfang Li、Lianhui Wang、Xiuling Cui
DOI:10.1021/acs.joc.8b02396
日期:2019.1.18
An efficient protocol to synthesize substituted benzo[4,5]imidazo[1,2-c]quinazolines starting from N-LG-2-phenylbenzoimidazole and dioxazolones catalyzed by Rh(III) or Ir(III) has been developed. Various substituted benzo[4,5]imidazo[1,2-c]quinazolines could be easily provided in up to 99% yield. A large range of substrates and functional groups are compatible for this transformation. This method features low catalyst loading, acid-free conditions, and low solvent consumption.